Heathkit links parts for sale, service, modifications, stuff on certain models etc. no manual or schematic links here.

For the SB200/201 click here also here also here and this one is very nicely done. here

Great site for model HW-101 only. click here

Trouble shooting tips about 30 models click here

CW Filters for Heathkit radios click here

Improvements for the SB-220 Nov.-Dec., 1990 QST article). click here

Heathkit HW-100/101 and SB-100/101/101W/102 click here

This company will make replacement variable capacitors for heathkit line. They were the original manufacturer for heath http://www.orenelliottproducts.com/